Commit | Line | Data |
---|---|---|
c627d613 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | /* | |
21 | Utilities used in rsync | |
22 | ||
23 | tridge, June 1996 | |
24 | */ | |
25 | #include "rsync.h" | |
26 | ||
c7c11a0d DD |
27 | extern int verbose; |
28 | ||
f0359dd0 AT |
29 | |
30 | /**************************************************************************** | |
31 | Set a fd into nonblocking mode. Uses POSIX O_NONBLOCK if available, | |
32 | else | |
33 | if SYSV use O_NDELAY | |
34 | if BSD use FNDELAY | |
35 | ****************************************************************************/ | |
36 | void set_nonblocking(int fd) | |
37 | { | |
38 | int val; | |
39 | ||
40 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
41 | return; | |
42 | if (!(val & NONBLOCK_FLAG)) { | |
43 | val |= NONBLOCK_FLAG; | |
44 | fcntl(fd, F_SETFL, val); | |
45 | } | |
46 | } | |
47 | ||
48 | ||
49 | /* create a file descriptor pair - like pipe() but use socketpair if | |
50 | possible (because of blocking issues on pipes) | |
51 | ||
52 | always set non-blocking | |
53 | */ | |
08f15335 AT |
54 | int fd_pair(int fd[2]) |
55 | { | |
f0359dd0 AT |
56 | int ret; |
57 | ||
08f15335 | 58 | #if HAVE_SOCKETPAIR |
f0359dd0 | 59 | ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd); |
08f15335 | 60 | #else |
f0359dd0 | 61 | ret = pipe(fd); |
08f15335 | 62 | #endif |
f0359dd0 AT |
63 | |
64 | if (ret == 0) { | |
65 | set_nonblocking(fd[0]); | |
66 | set_nonblocking(fd[1]); | |
67 | } | |
68 | ||
69 | return ret; | |
08f15335 AT |
70 | } |
71 | ||
72 | ||
c627d613 AT |
73 | /* this is taken from CVS */ |
74 | int piped_child(char **command,int *f_in,int *f_out) | |
75 | { | |
76 | int pid; | |
77 | int to_child_pipe[2]; | |
78 | int from_child_pipe[2]; | |
79 | ||
08f15335 AT |
80 | if (fd_pair(to_child_pipe) < 0 || |
81 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 82 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 83 | exit_cleanup(RERR_IPC); |
c627d613 AT |
84 | } |
85 | ||
86 | ||
3ba62a83 | 87 | pid = do_fork(); |
c627d613 | 88 | if (pid < 0) { |
9486289c | 89 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 90 | exit_cleanup(RERR_IPC); |
c627d613 AT |
91 | } |
92 | ||
93 | if (pid == 0) | |
94 | { | |
6574b4f7 | 95 | extern int orig_umask; |
c627d613 AT |
96 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || |
97 | close(to_child_pipe[1]) < 0 || | |
98 | close(from_child_pipe[0]) < 0 || | |
99 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 100 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 101 | exit_cleanup(RERR_IPC); |
c627d613 | 102 | } |
773f2bd4 AT |
103 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); |
104 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
6574b4f7 | 105 | umask(orig_umask); |
c627d613 | 106 | execvp(command[0], command); |
9486289c | 107 | rprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 108 | command[0],strerror(errno)); |
65417579 | 109 | exit_cleanup(RERR_IPC); |
c627d613 AT |
110 | } |
111 | ||
112 | if (close(from_child_pipe[1]) < 0 || | |
113 | close(to_child_pipe[0]) < 0) { | |
9486289c | 114 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 115 | exit_cleanup(RERR_IPC); |
c627d613 AT |
116 | } |
117 | ||
118 | *f_in = from_child_pipe[0]; | |
119 | *f_out = to_child_pipe[1]; | |
3eb38818 | 120 | |
c627d613 AT |
121 | return pid; |
122 | } | |
123 | ||
366345fe AT |
124 | int local_child(int argc, char **argv,int *f_in,int *f_out) |
125 | { | |
126 | int pid; | |
127 | int to_child_pipe[2]; | |
128 | int from_child_pipe[2]; | |
129 | ||
08f15335 AT |
130 | if (fd_pair(to_child_pipe) < 0 || |
131 | fd_pair(from_child_pipe) < 0) { | |
9486289c | 132 | rprintf(FERROR,"pipe: %s\n",strerror(errno)); |
65417579 | 133 | exit_cleanup(RERR_IPC); |
366345fe AT |
134 | } |
135 | ||
136 | ||
137 | pid = do_fork(); | |
138 | if (pid < 0) { | |
9486289c | 139 | rprintf(FERROR,"fork: %s\n",strerror(errno)); |
65417579 | 140 | exit_cleanup(RERR_IPC); |
366345fe AT |
141 | } |
142 | ||
143 | if (pid == 0) { | |
144 | extern int am_sender; | |
145 | extern int am_server; | |
146 | ||
147 | am_sender = !am_sender; | |
148 | am_server = 1; | |
149 | ||
150 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
151 | close(to_child_pipe[1]) < 0 || | |
152 | close(from_child_pipe[0]) < 0 || | |
153 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
9486289c | 154 | rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
65417579 | 155 | exit_cleanup(RERR_IPC); |
366345fe AT |
156 | } |
157 | if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]); | |
158 | if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]); | |
9486289c | 159 | start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv); |
366345fe AT |
160 | } |
161 | ||
162 | if (close(from_child_pipe[1]) < 0 || | |
163 | close(to_child_pipe[0]) < 0) { | |
9486289c | 164 | rprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
65417579 | 165 | exit_cleanup(RERR_IPC); |
366345fe AT |
166 | } |
167 | ||
168 | *f_in = from_child_pipe[0]; | |
169 | *f_out = to_child_pipe[1]; | |
170 | ||
171 | return pid; | |
172 | } | |
173 | ||
174 | ||
c627d613 AT |
175 | |
176 | void out_of_memory(char *str) | |
177 | { | |
9486289c | 178 | rprintf(FERROR,"ERROR: out of memory in %s\n",str); |
65417579 | 179 | exit_cleanup(RERR_MALLOC); |
575f2fca AT |
180 | } |
181 | ||
182 | void overflow(char *str) | |
183 | { | |
9486289c | 184 | rprintf(FERROR,"ERROR: buffer overflow in %s\n",str); |
65417579 | 185 | exit_cleanup(RERR_MALLOC); |
c627d613 AT |
186 | } |
187 | ||
188 | ||
c627d613 AT |
189 | |
190 | int set_modtime(char *fname,time_t modtime) | |
191 | { | |
31e12522 AT |
192 | extern int dry_run; |
193 | if (dry_run) return 0; | |
194 | { | |
1e9f155a | 195 | #ifdef HAVE_UTIMBUF |
31e12522 AT |
196 | struct utimbuf tbuf; |
197 | tbuf.actime = time(NULL); | |
198 | tbuf.modtime = modtime; | |
199 | return utime(fname,&tbuf); | |
c627d613 | 200 | #elif defined(HAVE_UTIME) |
31e12522 AT |
201 | time_t t[2]; |
202 | t[0] = time(NULL); | |
203 | t[1] = modtime; | |
204 | return utime(fname,t); | |
c627d613 | 205 | #else |
31e12522 AT |
206 | struct timeval t[2]; |
207 | t[0].tv_sec = time(NULL); | |
208 | t[0].tv_usec = 0; | |
209 | t[1].tv_sec = modtime; | |
210 | t[1].tv_usec = 0; | |
211 | return utimes(fname,t); | |
c627d613 | 212 | #endif |
31e12522 | 213 | } |
c627d613 | 214 | } |
94481d91 | 215 | |
720b47f2 | 216 | |
6574b4f7 AT |
217 | /**************************************************************************** |
218 | create any necessary directories in fname. Unfortunately we don't know | |
219 | what perms to give the directory when this is called so we need to rely | |
220 | on the umask | |
221 | ****************************************************************************/ | |
222 | int create_directory_path(char *fname) | |
223 | { | |
224 | extern int orig_umask; | |
225 | char *p; | |
226 | ||
227 | while (*fname == '/') fname++; | |
228 | while (strncmp(fname,"./",2)==0) fname += 2; | |
229 | ||
230 | p = fname; | |
231 | while ((p=strchr(p,'/'))) { | |
232 | *p = 0; | |
1b2d733a | 233 | do_mkdir(fname,0777 & ~orig_umask); |
6574b4f7 AT |
234 | *p = '/'; |
235 | p++; | |
236 | } | |
237 | return 0; | |
238 | } | |
950ab32d AT |
239 | |
240 | ||
241 | /* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted. | |
242 | Return LEN upon success, write's (negative) error code otherwise. | |
243 | ||
244 | derived from GNU C's cccp.c. | |
245 | */ | |
a5343e76 | 246 | static int full_write(int desc, char *ptr, int len) |
950ab32d AT |
247 | { |
248 | int total_written; | |
249 | ||
250 | total_written = 0; | |
251 | while (len > 0) { | |
252 | int written = write (desc, ptr, len); | |
253 | if (written < 0) { | |
254 | #ifdef EINTR | |
255 | if (errno == EINTR) | |
256 | continue; | |
257 | #endif | |
258 | return written; | |
259 | } | |
260 | total_written += written; | |
261 | ptr += written; | |
262 | len -= written; | |
263 | } | |
264 | return total_written; | |
265 | } | |
266 | ||
267 | /* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted. | |
268 | Return the actual number of bytes read, zero for EOF, or negative | |
269 | for an error. | |
270 | ||
271 | derived from GNU C's cccp.c. */ | |
6e4fb64e | 272 | static int safe_read(int desc, char *ptr, int len) |
950ab32d AT |
273 | { |
274 | int n_chars; | |
275 | ||
276 | if (len <= 0) | |
277 | return len; | |
278 | ||
279 | #ifdef EINTR | |
280 | do { | |
281 | n_chars = read(desc, ptr, len); | |
282 | } while (n_chars < 0 && errno == EINTR); | |
283 | #else | |
284 | n_chars = read(desc, ptr, len); | |
285 | #endif | |
286 | ||
287 | return n_chars; | |
288 | } | |
289 | ||
290 | ||
291 | /* copy a file - this is used in conjunction with the --temp-dir option */ | |
292 | int copy_file(char *source, char *dest, mode_t mode) | |
293 | { | |
294 | int ifd; | |
295 | int ofd; | |
296 | char buf[1024 * 8]; | |
297 | int len; /* Number of bytes read into `buf'. */ | |
298 | ||
8c9fd200 | 299 | ifd = do_open(source, O_RDONLY, 0); |
950ab32d | 300 | if (ifd == -1) { |
9486289c | 301 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
302 | source,strerror(errno)); |
303 | return -1; | |
304 | } | |
305 | ||
c7c11a0d | 306 | if (robust_unlink(dest) && errno != ENOENT) { |
9486289c | 307 | rprintf(FERROR,"unlink %s: %s\n", |
950ab32d AT |
308 | dest,strerror(errno)); |
309 | return -1; | |
310 | } | |
311 | ||
31e12522 | 312 | ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode); |
c46ded46 | 313 | if (ofd == -1) { |
9486289c | 314 | rprintf(FERROR,"open %s: %s\n", |
950ab32d AT |
315 | dest,strerror(errno)); |
316 | close(ifd); | |
317 | return -1; | |
318 | } | |
319 | ||
320 | while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) { | |
321 | if (full_write(ofd, buf, len) < 0) { | |
9486289c | 322 | rprintf(FERROR,"write %s: %s\n", |
950ab32d AT |
323 | dest,strerror(errno)); |
324 | close(ifd); | |
325 | close(ofd); | |
326 | return -1; | |
327 | } | |
328 | } | |
329 | ||
330 | close(ifd); | |
331 | close(ofd); | |
332 | ||
333 | if (len < 0) { | |
9486289c | 334 | rprintf(FERROR,"read %s: %s\n", |
950ab32d AT |
335 | source,strerror(errno)); |
336 | return -1; | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
feaa89c4 | 341 | |
c7c11a0d DD |
342 | /* |
343 | Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so | |
344 | rename to <path>/.rsyncNNN instead. Note that successive rsync runs | |
345 | will shuffle the filenames around a bit as long as the file is still | |
346 | busy; this is because this function does not know if the unlink call | |
347 | is due to a new file coming in, or --delete trying to remove old | |
348 | .rsyncNNN files, hence it renames it each time. | |
349 | */ | |
350 | /* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */ | |
351 | #define MAX_RENAMES_DIGITS 3 | |
352 | #define MAX_RENAMES 1000 | |
353 | ||
354 | int robust_unlink(char *fname) | |
355 | { | |
356 | #ifndef ETXTBSY | |
357 | return do_unlink(fname); | |
358 | #else | |
359 | static int counter = 1; | |
360 | int rc, pos, start; | |
361 | char path[MAXPATHLEN]; | |
362 | ||
363 | rc = do_unlink(fname); | |
364 | if ((rc == 0) || (errno != ETXTBSY)) | |
365 | return rc; | |
366 | ||
367 | strlcpy(path, fname, MAXPATHLEN); | |
368 | ||
369 | pos = strlen(path); | |
370 | while((path[--pos] != '/') && (pos >= 0)) | |
371 | ; | |
372 | ++pos; | |
373 | strlcpy(&path[pos], ".rsync", MAXPATHLEN-pos); | |
374 | pos += sizeof(".rsync")-1; | |
375 | ||
376 | if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) { | |
377 | errno = ETXTBSY; | |
378 | return -1; | |
379 | } | |
380 | ||
381 | /* start where the last one left off to reduce chance of clashes */ | |
382 | start = counter; | |
383 | do { | |
384 | sprintf(&path[pos], "%03d", counter); | |
385 | if (++counter >= MAX_RENAMES) | |
386 | counter = 1; | |
387 | } while (((rc = access(path, 0)) == 0) && (counter != start)); | |
388 | ||
389 | if (verbose > 0) | |
390 | rprintf(FINFO,"renaming %s to %s because of text busy\n", | |
391 | fname, path); | |
392 | ||
393 | /* maybe we should return rename()'s exit status? Nah. */ | |
394 | if (do_rename(fname, path) != 0) { | |
395 | errno = ETXTBSY; | |
396 | return -1; | |
397 | } | |
398 | return 0; | |
399 | #endif | |
400 | } | |
401 | ||
402 | int robust_rename(char *from, char *to) | |
403 | { | |
404 | #ifndef ETXTBSY | |
405 | return do_rename(from, to); | |
406 | #else | |
407 | int rc = do_rename(from, to); | |
408 | if ((rc == 0) || (errno != ETXTBSY)) | |
409 | return rc; | |
410 | if (robust_unlink(to) != 0) | |
411 | return -1; | |
412 | return do_rename(from, to); | |
413 | #endif | |
feaa89c4 | 414 | } |
3ba62a83 AT |
415 | |
416 | ||
417 | static pid_t all_pids[10]; | |
418 | static int num_pids; | |
419 | ||
420 | /* fork and record the pid of the child */ | |
421 | pid_t do_fork(void) | |
422 | { | |
423 | pid_t newpid = fork(); | |
424 | ||
425 | if (newpid) { | |
426 | all_pids[num_pids++] = newpid; | |
427 | } | |
428 | return newpid; | |
429 | } | |
430 | ||
431 | /* kill all children */ | |
432 | void kill_all(int sig) | |
433 | { | |
434 | int i; | |
435 | for (i=0;i<num_pids;i++) { | |
436 | if (all_pids[i] != getpid()) | |
437 | kill(all_pids[i], sig); | |
438 | } | |
439 | } | |
9486289c | 440 | |
8ef4ffd6 AT |
441 | /* turn a user name into a uid */ |
442 | int name_to_uid(char *name, uid_t *uid) | |
443 | { | |
444 | struct passwd *pass; | |
445 | if (!name || !*name) return 0; | |
446 | pass = getpwnam(name); | |
447 | if (pass) { | |
448 | *uid = pass->pw_uid; | |
449 | return 1; | |
450 | } | |
451 | return 0; | |
452 | } | |
453 | ||
454 | /* turn a group name into a gid */ | |
455 | int name_to_gid(char *name, gid_t *gid) | |
456 | { | |
457 | struct group *grp; | |
458 | if (!name || !*name) return 0; | |
459 | grp = getgrnam(name); | |
460 | if (grp) { | |
461 | *gid = grp->gr_gid; | |
462 | return 1; | |
463 | } | |
464 | return 0; | |
465 | } | |
466 | ||
ff8b29b8 | 467 | |
31593dd6 AT |
468 | /* lock a byte range in a open file */ |
469 | int lock_range(int fd, int offset, int len) | |
0c515f17 | 470 | { |
31593dd6 | 471 | struct flock lock; |
0c515f17 | 472 | |
31593dd6 AT |
473 | lock.l_type = F_WRLCK; |
474 | lock.l_whence = SEEK_SET; | |
475 | lock.l_start = offset; | |
476 | lock.l_len = len; | |
477 | lock.l_pid = 0; | |
478 | ||
479 | return fcntl(fd,F_SETLK,&lock) == 0; | |
0c515f17 | 480 | } |
874895d5 AT |
481 | |
482 | ||
cb13abfe | 483 | static void glob_expand_one(char *s, char **argv, int *argc, int maxargs) |
874895d5 | 484 | { |
932be9aa | 485 | #if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H)) |
e42c9458 | 486 | if (!*s) s = "."; |
087bf010 | 487 | argv[*argc] = strdup(s); |
874895d5 AT |
488 | (*argc)++; |
489 | return; | |
490 | #else | |
cb13abfe | 491 | extern int sanitize_paths; |
874895d5 AT |
492 | glob_t globbuf; |
493 | int i; | |
494 | ||
e42c9458 AT |
495 | if (!*s) s = "."; |
496 | ||
cb13abfe DD |
497 | argv[*argc] = strdup(s); |
498 | if (sanitize_paths) { | |
499 | sanitize_path(argv[*argc], NULL); | |
500 | } | |
087bf010 | 501 | |
874895d5 AT |
502 | memset(&globbuf, 0, sizeof(globbuf)); |
503 | glob(argv[*argc], 0, NULL, &globbuf); | |
504 | if (globbuf.gl_pathc == 0) { | |
505 | (*argc)++; | |
506 | globfree(&globbuf); | |
507 | return; | |
508 | } | |
509 | for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) { | |
510 | if (i == 0) free(argv[*argc]); | |
511 | argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]); | |
512 | if (!argv[(*argc) + i]) out_of_memory("glob_expand"); | |
513 | } | |
514 | globfree(&globbuf); | |
515 | (*argc) += i; | |
516 | #endif | |
517 | } | |
5a96ee05 | 518 | |
cb13abfe | 519 | void glob_expand(char *base1, char **argv, int *argc, int maxargs) |
087bf010 AT |
520 | { |
521 | char *s = argv[*argc]; | |
522 | char *p, *q; | |
ba5e128d | 523 | char *base = base1; |
087bf010 AT |
524 | |
525 | if (!s || !*s) return; | |
526 | ||
e42c9458 AT |
527 | if (strncmp(s, base, strlen(base)) == 0) { |
528 | s += strlen(base); | |
529 | } | |
530 | ||
087bf010 AT |
531 | s = strdup(s); |
532 | if (!s) out_of_memory("glob_expand"); | |
533 | ||
ba5e128d AT |
534 | base = (char *)malloc(strlen(base1)+3); |
535 | if (!base) out_of_memory("glob_expand"); | |
536 | ||
537 | sprintf(base," %s/", base1); | |
538 | ||
087bf010 AT |
539 | q = s; |
540 | while ((p = strstr(q,base)) && ((*argc) < maxargs)) { | |
ba5e128d AT |
541 | /* split it at this point */ |
542 | *p = 0; | |
cb13abfe | 543 | glob_expand_one(q, argv, argc, maxargs); |
ba5e128d | 544 | q = p+strlen(base); |
087bf010 AT |
545 | } |
546 | ||
cb13abfe | 547 | if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs); |
087bf010 AT |
548 | |
549 | free(s); | |
ba5e128d | 550 | free(base); |
087bf010 | 551 | } |
5a96ee05 AT |
552 | |
553 | /******************************************************************* | |
554 | convert a string to lower case | |
555 | ********************************************************************/ | |
556 | void strlower(char *s) | |
557 | { | |
558 | while (*s) { | |
559 | if (isupper(*s)) *s = tolower(*s); | |
560 | s++; | |
561 | } | |
562 | } | |
e42c9458 | 563 | |
37f9805d AT |
564 | /* this is like vsnprintf but it always null terminates, so you |
565 | can fit at most n-1 chars in */ | |
e42c9458 AT |
566 | int vslprintf(char *str, int n, const char *format, va_list ap) |
567 | { | |
e42c9458 | 568 | int ret = vsnprintf(str, n, format, ap); |
37f9805d AT |
569 | if (ret >= n || ret < 0) { |
570 | str[n-1] = 0; | |
e42c9458 AT |
571 | return -1; |
572 | } | |
573 | str[ret] = 0; | |
574 | return ret; | |
e42c9458 AT |
575 | } |
576 | ||
577 | ||
578 | /* like snprintf but always null terminates */ | |
579 | int slprintf(char *str, int n, char *format, ...) | |
580 | { | |
581 | va_list ap; | |
582 | int ret; | |
583 | ||
584 | va_start(ap, format); | |
585 | ret = vslprintf(str,n,format,ap); | |
586 | va_end(ap); | |
587 | return ret; | |
588 | } | |
8d9dc9f9 | 589 | |
fe8c0a98 AT |
590 | |
591 | void *Realloc(void *p, int size) | |
592 | { | |
593 | if (!p) return (void *)malloc(size); | |
594 | return (void *)realloc(p, size); | |
595 | } | |
5243c216 AT |
596 | |
597 | ||
598 | void clean_fname(char *name) | |
599 | { | |
600 | char *p; | |
601 | int l; | |
602 | int modified = 1; | |
603 | ||
604 | if (!name) return; | |
605 | ||
606 | while (modified) { | |
607 | modified = 0; | |
608 | ||
609 | if ((p=strstr(name,"/./"))) { | |
610 | modified = 1; | |
611 | while (*p) { | |
612 | p[0] = p[2]; | |
613 | p++; | |
614 | } | |
615 | } | |
616 | ||
617 | if ((p=strstr(name,"//"))) { | |
618 | modified = 1; | |
619 | while (*p) { | |
620 | p[0] = p[1]; | |
621 | p++; | |
622 | } | |
623 | } | |
624 | ||
625 | if (strncmp(p=name,"./",2) == 0) { | |
626 | modified = 1; | |
627 | do { | |
628 | p[0] = p[2]; | |
629 | } while (*p++); | |
630 | } | |
631 | ||
632 | l = strlen(p=name); | |
633 | if (l > 1 && p[l-1] == '/') { | |
634 | modified = 1; | |
635 | p[l-1] = 0; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
1b8e662a DD |
640 | /* |
641 | * Make path appear as if a chroot had occurred: | |
1b8e662a | 642 | * 1. remove leading "/" (or replace with "." if at end) |
cb13abfe | 643 | * 2. remove leading ".." components (except those allowed by "reldir") |
1b8e662a | 644 | * 3. delete any other "<dir>/.." (recursively) |
79452d46 | 645 | * Can only shrink paths, so sanitizes in place. |
b5f9e67d DD |
646 | * While we're at it, remove double slashes and "." components like |
647 | * clean_fname does(), but DON'T remove a trailing slash because that | |
648 | * is sometimes significant on command line arguments. | |
79452d46 DD |
649 | * If "reldir" is non-null, it is a sanitized directory that the path will be |
650 | * relative to, so allow as many ".." at the beginning of the path as | |
651 | * there are components in reldir. This is used for symbolic link targets. | |
652 | * If reldir is non-null and the path began with "/", to be completely like | |
653 | * a chroot we should add in depth levels of ".." at the beginning of the | |
654 | * path, but that would blow the assumption that the path doesn't grow and | |
655 | * it is not likely to end up being a valid symlink anyway, so just do | |
656 | * the normal removal of the leading "/" instead. | |
1b8e662a DD |
657 | * Contributed by Dave Dykstra <dwd@bell-labs.com> |
658 | */ | |
659 | ||
cb13abfe | 660 | void sanitize_path(char *p, char *reldir) |
1b8e662a | 661 | { |
44e2e578 | 662 | char *start, *sanp; |
cb13abfe DD |
663 | int depth = 0; |
664 | int allowdotdot = 0; | |
665 | ||
666 | if (reldir) { | |
667 | depth++; | |
668 | while (*reldir) { | |
669 | if (*reldir++ == '/') { | |
670 | depth++; | |
671 | } | |
672 | } | |
673 | } | |
44e2e578 DD |
674 | start = p; |
675 | sanp = p; | |
b5f9e67d DD |
676 | while (*p == '/') { |
677 | /* remove leading slashes */ | |
678 | p++; | |
679 | } | |
1b8e662a | 680 | while (*p != '\0') { |
b5f9e67d | 681 | /* this loop iterates once per filename component in p. |
44e2e578 | 682 | * both p (and sanp if the original had a slash) should |
b5f9e67d DD |
683 | * always be left pointing after a slash |
684 | */ | |
685 | if ((*p == '.') && ((*(p+1) == '/') || (*(p+1) == '\0'))) { | |
686 | /* skip "." component */ | |
687 | while (*++p == '/') { | |
688 | /* skip following slashes */ | |
689 | ; | |
690 | } | |
cb13abfe DD |
691 | continue; |
692 | } | |
693 | allowdotdot = 0; | |
694 | if ((*p == '.') && (*(p+1) == '.') && | |
1b8e662a | 695 | ((*(p+2) == '/') || (*(p+2) == '\0'))) { |
cb13abfe DD |
696 | /* ".." component followed by slash or end */ |
697 | if ((depth > 0) && (sanp == start)) { | |
698 | /* allow depth levels of .. at the beginning */ | |
699 | --depth; | |
700 | allowdotdot = 1; | |
701 | } else { | |
702 | p += 2; | |
703 | if (*p == '/') | |
704 | p++; | |
705 | if (sanp != start) { | |
706 | /* back up sanp one level */ | |
707 | --sanp; /* now pointing at slash */ | |
708 | while ((sanp > start) && (*(sanp - 1) != '/')) { | |
709 | /* skip back up to slash */ | |
710 | sanp--; | |
711 | } | |
b5f9e67d | 712 | } |
cb13abfe | 713 | continue; |
1b8e662a | 714 | } |
cb13abfe DD |
715 | } |
716 | while (1) { | |
717 | /* copy one component through next slash */ | |
718 | *sanp++ = *p++; | |
719 | if ((*p == '\0') || (*(p-1) == '/')) { | |
720 | while (*p == '/') { | |
721 | /* skip multiple slashes */ | |
722 | p++; | |
b5f9e67d | 723 | } |
cb13abfe | 724 | break; |
1b8e662a DD |
725 | } |
726 | } | |
cb13abfe DD |
727 | if (allowdotdot) { |
728 | /* move the virtual beginning to leave the .. alone */ | |
729 | start = sanp; | |
730 | } | |
1b8e662a | 731 | } |
cb13abfe | 732 | if ((sanp == start) && !allowdotdot) { |
b5f9e67d | 733 | /* ended up with nothing, so put in "." component */ |
79452d46 DD |
734 | /* |
735 | * note that the !allowdotdot doesn't prevent this from | |
736 | * happening in all allowed ".." situations, but I didn't | |
737 | * think it was worth putting in an extra variable to ensure | |
738 | * it since an extra "." won't hurt in those situations. | |
739 | */ | |
44e2e578 | 740 | *sanp++ = '.'; |
b5f9e67d | 741 | } |
44e2e578 | 742 | *sanp = '\0'; |
1b8e662a DD |
743 | } |
744 | ||
5243c216 AT |
745 | |
746 | static char curr_dir[MAXPATHLEN]; | |
747 | ||
748 | /* like chdir() but can be reversed with pop_dir() if save is set. It | |
749 | is also much faster as it remembers where we have been */ | |
750 | char *push_dir(char *dir, int save) | |
751 | { | |
752 | char *ret = curr_dir; | |
753 | static int initialised; | |
754 | ||
755 | if (!initialised) { | |
756 | initialised = 1; | |
757 | getcwd(curr_dir, sizeof(curr_dir)-1); | |
758 | } | |
759 | ||
c226b7c2 DD |
760 | if (!dir) return NULL; /* this call was probably just to initialize */ |
761 | ||
5243c216 AT |
762 | if (chdir(dir)) return NULL; |
763 | ||
764 | if (save) { | |
765 | ret = strdup(curr_dir); | |
766 | } | |
767 | ||
768 | if (*dir == '/') { | |
37f9805d | 769 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 | 770 | } else { |
37f9805d AT |
771 | strlcat(curr_dir,"/", sizeof(curr_dir)); |
772 | strlcat(curr_dir,dir, sizeof(curr_dir)); | |
5243c216 AT |
773 | } |
774 | ||
775 | clean_fname(curr_dir); | |
776 | ||
777 | return ret; | |
778 | } | |
779 | ||
780 | /* reverse a push_dir call */ | |
781 | int pop_dir(char *dir) | |
782 | { | |
783 | int ret; | |
784 | ||
785 | ret = chdir(dir); | |
786 | if (ret) { | |
787 | free(dir); | |
788 | return ret; | |
789 | } | |
790 | ||
37f9805d | 791 | strlcpy(curr_dir, dir, sizeof(curr_dir)); |
5243c216 AT |
792 | |
793 | free(dir); | |
794 | ||
795 | return 0; | |
796 | } | |
aa9b77a5 AT |
797 | |
798 | /* we need to supply our own strcmp function for file list comparisons | |
799 | to ensure that signed/unsigned usage is consistent between machines. */ | |
800 | int u_strcmp(const char *cs1, const char *cs2) | |
801 | { | |
5a788ade AT |
802 | const uchar *s1 = (const uchar *)cs1; |
803 | const uchar *s2 = (const uchar *)cs2; | |
aa9b77a5 AT |
804 | |
805 | while (*s1 && *s2 && (*s1 == *s2)) { | |
806 | s1++; s2++; | |
807 | } | |
808 | ||
809 | return (int)*s1 - (int)*s2; | |
810 | } | |
eb86d661 | 811 | |
43b06eea | 812 | static OFF_T last_ofs; |
eb86d661 | 813 | |
166aa723 | 814 | void end_progress(OFF_T size) |
eb86d661 AT |
815 | { |
816 | extern int do_progress, am_server; | |
817 | ||
818 | if (do_progress && !am_server) { | |
166aa723 | 819 | rprintf(FINFO,"%.0f (100%%)\n", (double)size); |
eb86d661 | 820 | } |
43b06eea | 821 | last_ofs = 0; |
eb86d661 AT |
822 | } |
823 | ||
824 | void show_progress(OFF_T ofs, OFF_T size) | |
825 | { | |
826 | extern int do_progress, am_server; | |
827 | ||
828 | if (do_progress && !am_server) { | |
43b06eea AT |
829 | if (ofs > last_ofs + 1000) { |
830 | int pct = (int)((100.0*ofs)/size); | |
eb86d661 | 831 | rprintf(FINFO,"%.0f (%d%%)\r", (double)ofs, pct); |
43b06eea | 832 | last_ofs = ofs; |
eb86d661 AT |
833 | } |
834 | } | |
835 | } | |
4b957c22 AT |
836 | |
837 | /* determine if a symlink points outside the current directory tree */ | |
838 | int unsafe_symlink(char *dest, char *src) | |
839 | { | |
840 | char *tok; | |
841 | int depth = 0; | |
842 | ||
843 | /* all absolute and null symlinks are unsafe */ | |
844 | if (!dest || !(*dest) || (*dest == '/')) return 1; | |
845 | ||
846 | src = strdup(src); | |
847 | if (!src) out_of_memory("unsafe_symlink"); | |
848 | ||
849 | /* find out what our safety margin is */ | |
850 | for (tok=strtok(src,"/"); tok; tok=strtok(NULL,"/")) { | |
851 | if (strcmp(tok,"..") == 0) { | |
852 | depth=0; | |
853 | } else if (strcmp(tok,".") == 0) { | |
854 | /* nothing */ | |
855 | } else { | |
856 | depth++; | |
857 | } | |
858 | } | |
859 | free(src); | |
860 | ||
861 | /* drop by one to account for the filename portion */ | |
862 | depth--; | |
863 | ||
864 | dest = strdup(dest); | |
865 | if (!dest) out_of_memory("unsafe_symlink"); | |
866 | ||
867 | for (tok=strtok(dest,"/"); tok; tok=strtok(NULL,"/")) { | |
868 | if (strcmp(tok,"..") == 0) { | |
869 | depth--; | |
870 | } else if (strcmp(tok,".") == 0) { | |
871 | /* nothing */ | |
872 | } else { | |
873 | depth++; | |
874 | } | |
875 | /* if at any point we go outside the current directory then | |
876 | stop - it is unsafe */ | |
877 | if (depth < 0) break; | |
878 | } | |
879 | ||
880 | free(dest); | |
881 | return (depth < 0); | |
882 | } | |
375a4556 | 883 | |
f7632fc6 AT |
884 | |
885 | /**************************************************************************** | |
886 | return the date and time as a string | |
887 | ****************************************************************************/ | |
888 | char *timestring(time_t t) | |
889 | { | |
890 | static char TimeBuf[200]; | |
891 | struct tm *tm = localtime(&t); | |
892 | ||
893 | #ifdef HAVE_STRFTIME | |
894 | strftime(TimeBuf,sizeof(TimeBuf)-1,"%Y/%m/%d %T",tm); | |
895 | #else | |
37f9805d | 896 | strlcpy(TimeBuf, asctime(tm), sizeof(TimeBuf)); |
f7632fc6 AT |
897 | #endif |
898 | ||
899 | if (TimeBuf[strlen(TimeBuf)-1] == '\n') { | |
900 | TimeBuf[strlen(TimeBuf)-1] = 0; | |
901 | } | |
902 | ||
903 | return(TimeBuf); | |
904 | } | |
905 | ||
d79d1c69 AT |
906 | |
907 | /**************************************************************************** | |
908 | like waitpid but does the WEXITSTATUS | |
909 | ****************************************************************************/ | |
dcc875e4 DD |
910 | #ifndef WEXITSTATUS |
911 | #define WEXITSTATUS(stat) ((int)(((stat)>>8)&0xFF)) | |
912 | #endif | |
d79d1c69 AT |
913 | void wait_process(pid_t pid, int *status) |
914 | { | |
915 | waitpid(pid, status, 0); | |
916 | *status = WEXITSTATUS(*status); | |
917 | } |